<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
     <script>
         function getArea(r)
         {
         
              return Math.PI*(Math.pow(r,2));

         }
         function getLong(r)
         {
            return Math.PI*2*r;
         }
     </script>
</body>
</html>